40 CFR § 60.4325a - What emission limit must I meet for NO if my turbine burns both natural gas and distillate oil (or some other combination of fuels)?
---
identifier: "/us/cfr/t40/s60.4325a"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 60.4325a - What emission limit must I meet for NO if my turbine burns both natural gas and distillate oil (or some other combination of fuels)?"
title_number: 40
title_name: "Protection of Environment"
section_number: "60.4325a"
section_name: "What emission limit must I meet for NO if my turbine burns both natural gas and distillate oil (or some other combination of fuels)?"
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "60"
part_name: "STANDARDS OF PERFORMANCE FOR NEW STATIONARY SOURCES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401"
regulatory_source: "36 FR 24877, Dec. 23, 1971, unless otherwise noted."
cfr_part: "60"
---
# 60.4325a What emission limit must I meet for NO if my turbine burns both natural gas and distillate oil (or some other combination of fuels)?
You must meet the emission limits specified in table 1 or 2 to this subpart. If your turbine operates below 70 percent of the base load rating at any point during an operating hour, the part load standard is applicable during the entire operating hour. For non-part load operating hours, if your stationary combustion turbine's heat input is greater than or equal to 50 percent fuels other than natural gas at any point during an operating hour, your combustion turbine must meet the corresponding limit for non-natural gas. For non-part load operating hours when your total heat input is greater than 50 percent natural gas while combusting some portion of non-natural gas fuels, you must meet the corresponding emissions standard as determined by prorating the applicable NO<sub>X</sub> standards, based on the applicable size category in table 1 or 2 to this subpart, as applicable, by the heat input from each fuel type.